/*
 *  $Id$

    Copyright (C) 2008  Nathaniel Waisbrot

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package termint.util;

/**
 * @author Nathaniel Waisbrot
 *
 */
public class MutablePair<A,B> {
	protected A a;
	protected B b;
	public MutablePair(A a, B b) {
		this.a = a;
		this.b = b;
	}
	
	@Override
	public String toString() {
		return "("+a+","+b+")";
	}
	
	@Override
	public boolean equals(Object obj) {
		if (obj instanceof MutablePair)
			return a.equals(((MutablePair<?,?>)obj).a) && b.equals(((MutablePair<?,?>)obj).b);
		else
			return false;
	}
	
	@Override
	public int hashCode() {
		return (a.hashCode() << 7) ^ b.hashCode();
	}
}
